Internal combustion engine comprising at least one cylinder and individual intake passages
AssigneeAB Volvo
InventorJan Karlsson
Life of this patent
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Abstract
An internal combustion engine (1) which comprises at least one cylinder (3), at least two suction valves (4, 5) per cylinder (3), and individual suction channels (6, 7) of longer and shorter length for each cylinder (3). Each suction channel (6, 7) communicates with a suction valve (4, 5) respectively. At least two of the suction valves (4, 5) have different closing times in order to increase the air quantity sucked into the cylinder (3), and thereby increase the torque and power of the internal combustion engine (1). According to one embodiment, a throttle can be arranged in each suction channel (6, 7) and the shorter suction channel (6) can be provided with a smaller area of cross section than the longer suction channel (7).
Claims17
Internal combustion engine (1) which comprises at least one cylinder (3), at least two suction valves (4, 5) per cylinder (3), and individual suction channels (6, 7) of longer and shorter length for each cylinder (3), each suction channel (6, 7) communicating with a suction valve (4, 5) respectively, and at least two of the suction valves (4, 5) have different closing times, characterized in that one suction valve (4) which communicates with a shorter suction channel (6) closes earlier than another suction valve (5) which communicates with a longer suction channel (7), so that suction air which reaches the cylinder space (11) is prevented to flow out through the first suction channel (6) when a high-pressure wave (7) reaches the cylinder space (11).
Dependencies are inferred from the claim text.